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Finding the Fourth Proportional to 98,670.34, 136,118.91 and 64,669.78

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Solution

The fourth proportional to 98,670.34, 136,118.91 and 64,669.78 is: 89,214.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,670.34 : 136,118.91 = 64,669.78 : x
  2. Step 2: Convert to fraction form
    98,670.34/136,118.91 = 64,669.78/x
  3. Step 3: Cross multiply
    98,670.34x = 136,118.91 × 64,669.78
  4. Step 4: Simplify right side
    98,670.34x = 8,802,779,963.54
  5. Step 5: Solve for x
    x = 8,802,779,963.54/98,670.34
  6. Step 6: Final answer
    x = 89,214.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.